:orphan:
# SNESGetNPCFunction
Gets the current function value and its norm from a nonlinear preconditioner after `SNESSolve()` has been called on that `SNES` 
## Synopsis
```
#include "petscsnes.h"  
PetscErrorCode SNESGetNPCFunction(SNES snes, Vec F, PetscReal *fnorm)
```
Collective


## Input Parameter

- ***snes -*** the `SNES` context



## Output Parameters

- ***F -*** function vector
- ***fnorm -*** the norm of `F`





## See Also
 `SNESGetNPC()`, `SNESSetNPC()`, `SNESComputeFunction()`, `SNESApplyNPC()`, `SNESSolve()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/snes/interface/snespc.c.html#SNESGetNPCFunction">src/snes/interface/snespc.c</A>


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[Index of all SNES routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)